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Enhancement of the Electrocatalytic Activity of Gold Nanoparticles via NaBH4 Treatment

등록일
2009년 2월 9일 13시 35분 39초
접수번호
0163
발표코드
38P263포 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
발표시간
금 <발표Ⅲ>
발표형식
포스터
발표분야
전기화학
저자 및
공동저자
Das Jagotamoy, 양해식
부산대학교 화학과, Korea
We report the enhancement of the electrocatalytic activity of Au nanoparticles for the electrooxidation of H2O2, glucose, and formic acid after NaBH4 treatment (without electrochemical or thermal pretreatment). Such treatment allows adsorption/absorption of hydrogen species on/into the Au nanoparticles, thereby forming an activated state which remains even after the hydrogen species have been removed. The adsorbed/absorbed hydrogen species are oxidized in air (or in solution), and the hydrogen-induced activated state slowly returns to the original, hydrogen-free state. The enhanced electrocatalytic activity is not directly related to the adsorbed/absorbed hydrogen species. In addition, we apply the enhanced electrocatalytic activity of Au nanoparticles to the detection of H2O2. The highly activated Au nanoparticles allow a low detection limit (100 nM). H2O2 could be detected at concentrations ranging from 100 nM to 100 mM (i.e., over six orders of magnitude).

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